Flask-hinge



(Model.) 2 shee'ts-sheet 1. P. D. BECKWITH. FLASK HINGE.

N0. 368,317. Patented Aug. 16,1887.

(Model.) 2 Sheets-Sheet 2.

P. D. BBGKWITH.

FLASK HINGE. No. 368,317. Patented Aug. 16, 1887.

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Ntra TATES ATENT Criticas FLASK-HINGE.

SPECIFICATION forming part of Letters Patent No. 368,317, dated August 16, 1887.

Application tiled February 21, 1887. Serial No. 228,776. (Model.)

To all whom it may concern:

Beit known that I, Pi-riLo D. BEcKWrrH, of Dowagiac, in the county of Cass and State of Michigan, have invented a new and useful Hinge, of which the following is a specifica tion.

My invention relates to that class of hinges that are detachable at pleasure, and more particularly to hinges used upon foundry-flasks.

The object of my invention is to provide a hinge that will permit lifting ofi' the upper part of a flask in a horizontal position, and that will, when the flask is opened by turning upon said hinge, beinterlocked in such a manner that the parts cannot be detached until the tiask isagain closed. l accomplish this by the device illustrated in the accompanying drawings, in which-- Figure l shows an elevation of one corner ofa flask having my device attached and the parts of the tiask slightly separated; Fig. 2, the same shown at right angles to the view in Fig. 1; Fig. 3, a plan view of the same, show ing the position ofthe parts when the ask is opened by turning upon the hinge; Fig. 4. the same when the flask is closed. Fig. 5 is aplan view of the hinge detached, and Fig. 6 an ele vation ofthe hinge closed.

Like letters refer to like parts in all the 1igures.

Arepresents the flask, to which are attached the plates a a, to each of which is att-ached a pintle, b, and a half knuckle or hook, c, so situated that their axes are in the same hori zontal line, and also so situated that the hook on each plate will engage with the pintle on the other plate when the flask is closed, thus forming a double hinge, each half of which is the duplicate of the other in reverse position.

The pintles b are made smaller in diameter at the middle, preferably in the form of frusta of cones, with the small ends adjacent, and the half knuckles or hooks have corresponding conical surfaces which half inclose said pintles.

The operation of my device is as follows: Vhen the liask is closed,the upper part of said flask can readily be lifted off in a horizontal position and again accurately replaced, the inclined conical surfaces ofthe pintles and hooks 5o serving to guide the upper part of the flask to proper place, the device in this case performing the functions of the usual guide-pins. W'hen the opposite side of the upper part of the flask is lifted and the device allowed to operate as a hinge upon which said upper part of the flask is turned, said device interlocks so that the parts cannot be separated until again closed, the pintle on the upper part resting in the hook on the lower part, and the hook on the upper part passing under the pintle on the lower part, thus preventing accidental displacement of the upper part of said tiask. The device also presents the same appearance and operates in the same way when the flask is either side up, thus being well adapted for work that has to be rolled oven7 which requires the opening ofthe flask while reversed or upside down, in which position the ordinary detachable hinge Will not operate.

I am aware that a hinge having a pintle on one part and an open knuckle or hook on the other engaging with said pintle, and the two parts detachable when in a certain relative position, is not new. l do not claim such broadly.

NVhat l claim,and desire to secure, is as follows:

l. A hinge having a pintle and an open knuckle or hook on each part` the knuckle or hook on each engaging with the pintle on the other, substantially as described.

2. A hinge having a pintle and an open knuckle or hook on each part, the knuckle or hook on each engaging with lhe pintle on the other, and each having inclined conical surfaces, substantially as described.

3. A hinge having a pintle and an open knuckle or hook on each part, the knuckle or hook on cach engaging with the pintle on the other and interlocking when open and detachable when closed, substantially as described.

PHIL() D. BECKWVITH.

Witn esses Cov W. HENDRYX, EMANUEL Pi-iiLLirsoN. 

